Answer:
1.) 40 × 28 = ( 40×20 ) + ( 40×8 )
= 800 + 320
= 1,120
2.) 80 × 49 = ( 80×40 ) + ( 80×9 )
= 3,200 + 720
= 3,920
3-4.) 312 × 20 = 6,240
5-6.) 155 × 30 = 3,450
7.) 1,710
8.) No
Step-by-step explanation:
If its wrong report
If write brainliest and Follow
#Caryonlearining
Hope it helps❤️
